631384987884 has 288 divisors, whose sum is σ = 1858390571520. Its totient is φ = 165772873728.

The previous prime is 631384987861. The next prime is 631384987927. The reversal of 631384987884 is 488789483136.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 145915329 + ... + 145919655.

It is an arithmetic number, because the mean of its divisors is an integer number (6452745040).

Almost surely, 2^631384987884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631384987884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929195285760).

631384987884 is an abundant number, since it is smaller than the sum of its proper divisors (1227005583636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631384987884 is a wasteful number, since it uses less digits than its factorization.

631384987884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757 (or 4748 counting only the distinct ones).

The product of its digits is 222953472, while the sum is 69.

The spelling of 631384987884 in words is "six hundred thirty-one billion, three hundred eighty-four million, nine hundred eighty-seven thousand, eight hundred eighty-four".